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Method for preparing organic acid esters of cellulose

US 2,362,575 A · Inventors: MALM CARL J

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Why it's free to use

  • Granted November 14, 1944. A patent granted before 1976 lasted at most 17 years from grant, so its term ended by November 14, 1961.
  • We check US rights only. Old patents can still inspire new ones: improvements may be patentable.
FiledMarch 17, 1942
GrantedNovember 14, 1944
Term endedNovember 14, 1961
Application number—
Classification (CPC)C08B3/06 +1 more
Length3 pages

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Full published documentText and every drawing sheet as a PDF.USPTOFile historyStatus, office actions, notices, fee records and petitions.USPTO Patent CenterPatent Public Search recordSearchable full text and bibliographic data.USPTO

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